“…L 2 = Macrocyclic ligand derived from bis-(2aminophenyl) disulphide and succinic acid (n=2), 24-membered ring; {Tetrabenzo [2,3,10,11,14,15,22,23][4,9,16,21]tet raaza [1,12,13,24]tetrathiacyclotetraicosane [5,7,1 7,20]tetraone}. L 3 =Macrocyclic ligand derived from bis-(2aminophenyl) disulphide and glutaric acid (n=3), 26-membered ring; {Tetrabenzo [2,3,11,12,15,16,24,25][4,10,17,23]te traaza [1,13,14,26]tetrathiacyclohexaicosane [5,9,18,22]tetraone}.…”